Jimmy Fallon turned 40 on Friday (Sept. 19) and to celebrate, "The Tonight Show" had a special surprise for him -- well, actually two special surprises.

Fallon teased on Thursday's show that Friday there would be a surprise musical guest that even he didn't know the identity of. It turned out to be Stevie Wonder, which is pretty cool. But what is even coolest is Seth Rogen and James Franco popping out of birthday cake as police strippers. Franco's u...